On February 9, Li Jing completed her PDRA by reporting to an reviewing  panel  including professors Li Jun李军，Tian Chongguo田崇国，Luo Chunling罗春玲, Ding Xiang丁翔 and Bi Xinhui毕新慧. Her study in the group, since April 2020, has been on ‘Radiocarbon-constrained verification of urban fossil-fuel CO2 emissions’.  She successfully changed her research area, from organic pollutants into carbon monitoring. Congratulations!